Christmas Bloody Christmas

The film starts with vignettes that resemble the typical Christmas advertisements, along with a news flash regarding a robotic Santa that's been recalled because of a certain malfunction that reverts it from its original programming from the US Defense Department.
Record store owner Tori closes up her store for Christmas Eve night with her employee Robbie. Robbie, who is attracted to Tori, convinces her out of meeting with a date from Tinder and going out drinking with him. The pair meet with their friends Jay and Lahna who work at a nearby Toy store that is equipped with one of the defective Santa Clauses. The group drinks and hangs out before Tori and Robbie leave to go to a bar. The robot Santa malfunctions and becomes a violent killing machine, murdering Jay and Lahna while they have sex.
Charmed by Robbie, Tori invites him back to her house, unaware they are being stalked by the robot Santa. They arrive at Tori's house and continue to flirt before finally having sex. Meanwhile, the robot Santa breaks into Tori's neighbors' house and slaughters the entire family; with Tori witnessing the child's murder. As she panics and warns Robbie, she notices the robot Santa has spotted her. Tori wakes up her sister Liddy and Liddy's husband Mike and attempts to escape the house with them and Robbie. The robot Santa attacks the group, killing Liddy and Mike while Tori and Robbie escape into Robbie's car. As they attempt to drive away, they find themselves blocked by another one of Tori's neighbors who is quickly killed by robot Santa. Unable to escape, Robbie is dragged out and killed by the robot Santa.
A responding police officer arrives and manages to gun down the robot Santa for a moment before the robot Santa recovers and kills the officer. Tori runs over the robot Santa with the officer's car and drives away where she stumbles across more officers and an ambulance responding to the scene. Tori flags them down to help and tells them of the officer's death and is arrested by Sheriff Munroe. Back at the police station, Tori struggles to convince Munroe about the robot Santa. The robot Santa returns, having commandeered the ambulance, and attacks the station, killing Munroe and his partner. Tori retrieves a shotgun and fends off the robot Santa. She drives away in the ambulance, where the robot Santa climbs onboard and Tori crashes. Tori uses the crash to set the robot Santa alight, severely damaging it.
Retreating to her record store, Tori is hunted by the robot Santa who is now nearly fully stripped to its robotic endoskeleton. After being chased through the store, Tori manages to outwit the robot Santa and destroy it. An exhausted and bloody Tori leaves the store and collapses onto the street outside as Christmas morning begins and starts to laugh hysterically.